BOSTON - The candidates running for U.S. Senate in Massachusetts, along with the public, are reacting to reports that two explosions near the finish line of the Boston Marathon have killed at least two people and injured dozens.

The five candidates hoping to win former U.S. Sen. John Kerry's seat are, clockwise from top, left, Democrats Edward Markey and Stephen Lynch, and Republicans Daniel Winslow, Gabriel Gomez and Michael Sullivan.

Democratic U.S. Rep. Edward Markey of Malden said: "I am disturbed and saddened by the explosions at the site of the Boston Marathon this afternoon. We all are grateful for the first responders who rushed to the scene to help the victims. The heart of the city is hanging heavy, and our thoughts and prayers are with everyone affected by this senseless tragedy."

Republican state Rep. Daniel Winslow of Norfolk, said: "My heart goes out to all those injured at today's Boston Marathon. My prayers will be with all those affected by this tragedy. I have ordered my campaign to suspend all activities until further notice."

Democratic U.S. Rep. Stephen Lynch of South Boston said: "I am terribly saddened by today’s news. Right now we need to let the trained emergency personnel do their jobs to ensure that there are no other threats, and that we can get a better sense of what happened. No matter who or what is responsible, this is a terrible tragedy for our city and our nation. Our thoughts and prayers are with those who have been injured today."

Republican candidate and former United States Attorney Michael Sullivan, said: "Our hearts and prayers are with those injured in today's horrific explosion during the Boston Marathon and the families of all concerned.

"I am confident in the combined efforts of the FBI, Boston Police Department, State Police and ATF, in their investigation into these explosions, that sadly have occurred on Patriot's Day--a day with much local and national symbolism.

"While the causes of these explosions have not yet been determined, if not accidental, I know these agencies and others will identify those responsible for these horrific and cowardly acts of violence and hold them accountable to the fullest extent of the law.

"May we together as citizens of the Commonwealth and across this nation pray for all effected by this terrible event."